Thanks for the advice everyone. I think I'll look into a Rigblaster or
similar gadget for the radio-to-computer-sound-card interface.
73,
Steve K8JQ
jdow wrote:
Unfortunately you MUST not connect a microphone to the MIC input unless
you put the radio in DATA mode. And DATA mode has a limited bandwidth.
A microphone on the MIC input will add noise to your ACC1 input in
normal mode.
{^_^}
----- Original Message -----
From: "Keith LaBorde - K4KAL" <k4kal@arrl.net>
To: <ic756pro2@yahoogroups.com>
Sent: 2004 November, 08, Monday 16:02
Subject: Re: [ic756pro2] Interfacing IC756PROII to sound card
>
> Steve,
>
> I use the ACC1 for my sound card connection to run PSK, RTTY, and other
digital modes.
> Don't see why you could not do voice the same way.
> I have recorded received SSB signals to a file and played them back, so
that is close to what you are wanting to do.
> I am using the SignaLink SL-1 as my interface between radio and computer
sound card.
> Be sure and use the mode USB-D or LSB-D, so your microphone jack is not
picking up background.
>
> Keith, K4KAL
>
> ----- Original Message -----
> From: Steve
> To: cq-contest@contesting.com ; ic756pro2@yahoogroups.com
> Sent: Monday, November 08, 2004 5:54 PM
> Subject: [ic756pro2] Interfacing IC756PROII to sound card
>
>
> A couple of questions for those of you who have interfaced an
IC756PROII
> to a computer sound card. My goal is to be able to use pre-recorded wav
> files as audio input to the transceiver. Contest software is N1MMLogger
> and it will provide a PTT function via a pin on a serial port.
>
> Is it ok to feed the audio out of the sound card speaker jack (it's
> colored green on my Creative AudioPCI sound card) thru a low-to-high
> impedance transformer to the IC756PROII ACC1 pin 4? I think a Radio
> Shack 273-1380 transformer is 8 ohm to 1000 ohm, so that's what I'm
> leaning toward.
>
> The Icom manual identifies ACC1 pin 4 as "Modulator input" and further
> specifies its input impedance as 10K and input level as approximately
> 100mV rms. How will the level provided by the sound card compare to
that
> 100mV rms spec? Any advice on how to match the hopefully higher sound
> card level to ACC1 pin 4?
>
> Is feeding the audio to the rig on ACC1 pin 4 just as good as the mic
> input? Advantages or disadvantages one compared to the other for
contesting?
>
> What's a good way to make the connection to ACC1 pin 4? I already
have a
> DIN plug in ACC1 which is cabled to a footswitch for PTT function.
> Wonder if I should terminate the 8 pins of ACC1 on a terminal strip for
> the sake of accessibility by footswitch, audio input and perhaps future
> needs?
>
> Thanks for the advice!!
>
> Steve K8JQ
>
>
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